Drawing mechanism



sept. 29, 1925. A. C. BUTLER DRAWING MECHANISM Filed May 1, 1923- Patented Sept. 29,]1925. i

'UNITED STATES Amm cnam BUTLER, or Bosman, xAsson'usET'rs nnawnm ninemsn. l

Application ma nay i, 192s.- seriai m. 635,93( l Toall 'whomz'tmay concern.'

Be it known that I, ARTHUR CronJ u'r- LER, a subject of the King of Great Britain, residing at Boston, in the county of Suffolk and State of Massachusetts, have 1nvented new and useful Improvements in Drawing Mechanism, of which the following is a specification.

This invention relates to mechanism for drawing slivers, rovings, and the like, and provides' such a mechanism wherein a considerable drawing may be effected. Prefi erably a retarding plate is'associated with the drawingrollers, but this mechanism is so designed. that if it is not desired to employ such a plate, the rollers are so relatively disposed as to effect a dragging or retarding action to the roving which maj.Y be adjusted to suit the 'length of the staple. Means are also provided to permit the pressure applying means to be removed from certain of the upper rollers and su ported clear therefrom as long as may e desired.

Further objects and advantage-ous details and combinations of parts will appear from a more complete description of an embodiment illustrated in the accompanying drawings in which Figure 1 is a fragmentary top plan of the machine.

Figure 2 is a section on line 2-2 of Figure 1.

Figure 3 is a plan of one form of retardin plate.

teferring to these figures, 1 indicates a roller stand, it being understood that a plurality of these stands are arranged in spaced relation to support the drawing rollers therebetween. As shown each stand is provided with a top platform member 2 having its forward end upwardly extending to form a journal for the low-er forward roller 35E/t the rear end of the platform 2 is adjustably fixed a bracket 4 by means of a bolt 'passing through a slot in the platform and threaded in the bracket. Between the bracket 4-'and the forward roller 3 is positioned a, tiltable block 6 which as shown is pivoted at 7 to the forward portion of the bracket 4. This block 6 is formed at its forward end with a bearing for an intermediate lower roller 8 and back of this roller is positioned a bearin 9 for a rear intermediate roller 10. This earing 9 may be vertically and horizontally adjusted rellative to the roller 8, for this purpose' the forward end of the bearing carriesy a bolt 11 whose head 12 rides in a T slot 13 positioned lengthwise of the block 6. Through the rear end of the bearing 9 is threaded a bolt 14, the lower end of which bears on the upper face of the `block 6. By adjusting this bolt the rear end of the bearing may be raised or lowered relative to the block so as to adjust the height of the roller 10. By loosening the nut 15 on the bolt 11 the bearing may be moved lengthwise of the block 6 to any point desired and then fixed in position by tightening this nut. At the rear of the hearing 11 the block 6 has journaled thereon the lower rear roller 16.

The bracket 4 has a rearwardly extending lug 20 thereon perforated for the support of a pivot shaft 22 to which may be fixed, as by set screws 23, a plurality of cap bars 24.j Preferably there are more cap bars than roller stands, a cap bar bcing provided for each roller stand and others being positioned intermediate .the stands. As shown each cap bar is eXtensible, being formed of two sections 25 and 26, telescopically related, which may be fixed in axial adjustment by means of a set screw 27. The rear section 25 is shown as provided with oppositely disposed vertically arranged slots 28 in which may ride trunnions or journals 29 at the ends of rear upper rollers 30. The forward section 26 has adjustably fixed thereon a pair of blocks 81 and 82, these blocks being fixed in position by set screws 33, 34. The block 31 has at its forward depending end a pair of opposed upwardly and forwardly inclined slots 35 in which may ride trunnions or journals 36 of forward upper rollers 37 which cooperate with the lower front rollers 3 to feed the roving. The block 32 is provided on opposite faces with upwardly and rearwardly inclined slots 46 in which may ride trunnions or journals 41 of intermediate top rollers 42 which rest on the roving as it passes over the lower intermediate roller 8. The various rollers are so placed that as the roving passes over the front intermediate lower roller 8 it engagesv over a substantial arc thereof and the upper intermediate roller 42 which cooperates therewith may be adjusted along this arc as shown in solid and dotted lines in Figure 2 so that the nip between these intermefrom the, lower roller 3 in accordance with the length of the staple being drawn. Likewise the roller 37 may he set very close to the roller 8 so as to further shorten the distance between the nips of the forward rolls 37 and 3 and the intermediate rollers' 42 and 8, and to act as a guide to the roving passin over 'the roller 8 and to revent the fibers rom spreading or separating as they pass over the surface of roller 8. Likewise the forward upper roller 37 is adjustable over the surface of the lower roller 3 toward and from the lower intermediate roller 8.`

The block 6 carrying the intermediate and rear lower rollers is adjustable about its pivot 7 to raise and lower the forward intermediate rollers. For this purpose an adjusting bolt 45 vpreferably having a lock nut 46 is threaded through the platform 2 and engages at its upper end the lower forward face of the block 6. rlhe mounting of the upper rollers in slots in the cap bar permits this to be done without changing the relationship of the rollers.

Preferably a retarding plate 50 is formed to cooperate with certain of the rollers as the intermediate rollers 8 and 10. As shown this plate has a rearward extension 51 resting on the roller 10 and a forward portion 52 curved to conform to the periphery of the roller 8 and resting thereon forwardly of the nip between it and the roller 42, and provided with the roving guide slots 53 in its forward edge. In order to hold this plate in position it may have down-turned portions 54 engageable with the roller 8 rearwardly thereof. A neck portion 55 joins the front and rear portions 51 and 52, this neck portion extending between portions of reduced diameter oppositely disposed in the upper and lower intermediate rollers 42 and 8.

In Figure 3 a modified form of plate is shown in which the forward portion 52 is omitted, the rear portion 51 resting on the roller 10 being the active portion of the plate, the down-turned portions 54 engaging the roller 8 and the neck portion 55 extending between the rollers 42 and 8.

The mounting of the upper rollers in the cap bar in the various slots permits them to conform automatically to the positions of the lower rollers as determined by the setting of the screw 45 and also according to the adjustments of theblocks 31 and 32 on the forward section 26 of the cap bar and the position of this forward section with relation to the rear section 25. l

It is desirable that certaln of the upper rollers should be pressed against the roving passing over their corresponding lower rollers. For this purpose a bar 60 is provided, which rides on reduced portions of the upper rollers 30 and 42 substantially centrally of their lengths, this barbeing bent downwardly as at 61 forwardly of the roller 30 and then upwardly over it so as to cause this bar to rest on these rollers without being fed by the rotation thereof. The forward end of this bar is preferably straight, as shown, in order to cause no interference with the adjustment of the roller 42 lengthwise thereof. Intermediate the ends of this bar it is provided with a slot` 63 through which passes a reduced portion64 of a link 65, this link preferably being headed as at (i6 beneath the bar 60 in order to prevent its removal therefrom. It is also provided with shoulders 67 formed at the upper end of the reduced portion, this construction providing a loose connection between the upper end of the link and the bar permitting the rollers 30 and 42 to move up and down relatively without effecting the distribution of pressure exerted thereon through the bar.

As shown the link is arched over the rear upper roller 30 and then is brought downwardly and inwardly and passes through a hole 70 in the roller beam which supports the roller stands. Means is provided beneath this beam for imparting a downward pull on the link in order to exert pressure by the bar 60 on the upper rollers 30 and 42. As shown this is accomplished by means of a coil spring 72 surrounding the link 65 at its lower end and bearing between a washer 73 engaging the lower face of the beam 71 and a washer 74 held in position on the link adjustably by a nut 75 threaded thereon. It is sometimes desirable to remove the pressure from the upper rollers and for this purpose the link may be provided with a hook 76 extending rearwardly therefrom so positioned that the link may be raised upwardly against the tension of the spring 72 and the hook engaged over the shaft 22 which thus serves to retain' it in inoperative position with the bar 60 raised from the upper rollers.

Having thus described an embodiment of this invention it should be evident to those skilled in the art that many changes and lmodifications might be made therein without departing from its spirit or scope as defined by thc appended claims.

I claim:

1. In a machine of the class described, a roller, means to draw a roving over a substantial arc of the circumference of said roller, and a roller adjacent to said first mentioned roller and independent of said drawing means for pressing the roving against said first mentioned roller and positively adjustable lengthwise of said arc.

2. In a machine of the class described, a pair of front rollers receiving a roving therebetween, an intermediate roller over a substantial arc of whose circumference the roving passes, and a second intermediate roller bearing on the roving yon said first mentioned intermediate roller and positively adjustable over the periphery thereof t0- ward and from the nip between said front rollers.

3. In a machine of, the class described, a front roller, an intermediate roller, a roller cooperating with said front roller to feed a roving therebetween, a roller cooperating with said intermediate roller to feed a roving therebetween to said front rollers, said cooperating rollers being positively adjustable while in engagement with the roving over their mating rollers toward and from each other.

4. In a machine of the class described, lower rollers, upper rollers cooperating therewith, a barconstructed to rest on said upper rollers, a link at one end engaging said bar, means at the other end of said link urging said link in a direction to press said bar against said upper rollers to press them toward said lowerrollers, a fixed member and a hook carried by said link and engageable with said fixed member to hold said bar raised from said upper rollers.

5. In a machine of the class described. spaced roller stands, lower rollers journaled in said stands, cap bars pivoted to said stands, upper rollers journaled between said cap bars, a bar resting on said upper rollers, a link at one end loosely engaging said/bar, means at the other end of said link for urging it in a direction to press said bar against said upper rollers, and a hook on said link in position to be en aged over the'pivot of said cap bars and old said bar up from said upper rollers.

6. In a machine of the class described, front rollers, rear rollers, intermediate rollers, and means for adjusting said intermediate rollers vertically relatively to said front and rear rollers and relative to each other.

7. In a machine of the' class described. front rollers, rear rollers, intermediate rollers, and means for adjusting said intermediate rollers vertically relative to said front and rear rollers and vertically and horizontally relative to each other.

8. In a machine of the class described, lower rollersfupper rollers cooperating with and adjustable laterally of said lower rollers, and a retarder plate engaging the roving at certain of said rollers.

9. In a machine of the class described, lower rollers, upper rollers cooperating with and, adjustable laterally of said lower rollers, and a retarder plate resting on certain of saidI lower rollers.

10. In a machine of the class described comprising a pair of front rollers, a pair' of rollers in the rear of said front rollers, and means whereby the upper of said front rollers may be adjusted rearwardly to a position close to the lower of said rear rollers to prevent the spreading or separation of the bers as they pass over said lower rear roller.

11. In a machine of the class described comprising lower rollers, cap bars, upper rollers journaled in slots of said cap bars, and means for adjusting certain of said lower rollers vertically independent of said cap bars, the slots in said cap bars being so disposed as to preserve the relationship between said upper and lower rollers at various positions of adjustment of said lower rollers without affectin said cap bars.

12. In a machine of the class described, an intermediate roller, means including a pair of front rollers for drawing a roving over a substantial arc of the circumference of said intermediate roller, and a roller resting on said roving at said arc. I

13. In a machine of the class described, an intermediate roller, means includin a pair of front rollers for drawing a rovmg over a substantial arc of the circumference of said intermediate roller, and a roller resting on said Y roving at said arc and adjustable lengthwise thereof.

In testimony whereof I have affixed m signature.

ARTHUR oEcIL BUTLER. 

